In Dealthly Hallows, why didn’t the trio fight off the 6 snatchers?

They were in a tent, 6 snatchers had surrounded them from outside. Why didn’t they: 1. Dissaparate 2. Fight the snatchers off

Don’t tell me that they were outnumbered, they were even more outnumbered in Malfoy Manor where it was only Ron, Harry and Dobby against Lucius, Draco, Narcissa, Bellatrix, Wormtail and the snatchers!

Plus, Harry has fought off Voldemort long enough alone!